I have a scar on the back of my head. It is the result of a minibike accident when I was a child. When I had hair, the scar was hidden. When I shave my head it isn’t particularly noticeable. If my head has anything more than half a day’s growth of stubble, the scar stands out because hair won’t grow on the scar tissue.

I, a bald man, have a scar on my head that only shows when my hair grows out a bit.